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Phonon thermal transport properties of XB_(2)(X=Mg and Al)compounds:considering quantum confinement and electron-phonon interaction

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Rare Metals 2023年第9期42卷 3064-3074页

作者： Sen Liu Zheng Chang Xiao-Liang Zhang Kun-Peng Yuan Yu-Fei Gao Da-Wei Tang key Laboratory of Ocean Energy utilization and Energy Conservation of ministry of education School of Energy and Power EngineeringDalian University of TechnologyDalian 116024China

XB_(2)(X=Mg and Al)compounds have drawn great attention for their superior electronic characteristics and potential applications in semiconductors and *** study of phonon thermal transport properties of XB_(2)is significant to their application and mechanism behind *** this work,the phonon thermal transport properties of three-dimensional(3D)and two-dimensional(2D)XB_(2)were studied by first-principles *** considering the electron-phonon interaction(EPI),the thermal conductivities(TCs)of 3D Mg B_(2)and 3D Al B_(2)decrease by 29%and 16%which is consistent with experimental ***,the underlying mechanisms of reduction on lattice TCs are the decrease in phonon lifetime and heat capacity when considering quantum confinement *** importantly,we are surprised to find that there is a correlation between quantum confinement effect and *** quantum confinement will change the phonon and electron characteristics which has an impact on ***,our work is expected to provide insights into the phonon thermal transport properties of XB_(2)compounds considering EPI and quantum confinement effect.

关键词： Superconductor Phonon thermal transport properties Electron-phonon interaction(EPI) Quantum confinement effect

Assembly of a core–shell MOF with stability into polyacrylamide hydrogel for boosting extraction of uranium from seawater

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Nano Research 2024年第4期17卷 3398-3406页

作者： Yucheng Song Huanhuan Tan Shiliang Qin Zhong Liu Chuntai Liu Changyu Shen Peipei Yang Songwei Li National Engineering Research center for Advanced Polymer Processing Technology Key Laboratory of Materials Processing and Mold(Ministry of Education)Zhengzhou UniversityZhengzhou 450002China key Laboratory of Comprehensive and Highly Efficient utilization of Salt Lake resources Qinghai Provincial Key Laboratory of Resources and Chemistry of Salt LakesQinghai Institute of Salt LakesChinese Academy of SciencesXining 810008China

Efficient and selective extraction of uranium(U(VI))from seawater is essential for sustainable nuclear power *** study reports a novel adsorbent zeolitic imidazolate framework(ZIF)-67@SiO_(2)-A/polyacrylamide(PAM)which was synthesized by grafting the core–shell metal–organic frameworks(MOFs)-based nanostructures coated with the 3-aminopropyl triethoxysilane(APTES)functionalized SiO_(2)(SiO_(2)-A)onto PAM *** SiO_(2) shell was grown on the surface of MOF,which improved the acid-base resistance of *** introduction of ZIF-67@SiO_(2)-A enhances the specific surface area and adsorption efficiency of the *** ZIF-67@SiO_(2)-A/PAM shows remarkable adsorption capacity,fast adsorption kinetics,and good reusability for *** has excellent adsorption property(6.33 mg·g^(-1),30 d)in natural *** X-ray photoelectron spectroscopy(XPS),Fourier transform infrared(FTIR),energy dispersive spectroscopy(EDS)mappings,and density functional theory reveal that the coordination by N and O in ZIF-67@SiO_(2)-A/PAM with uranium is the main mechanism of uranium ***,ZIF-67@SiO_(2)-A/PAM has great potential to capture uranium from natural seawater.

关键词： hydrogel metal–organic frameworks core–shelled nanostructures uranium extraction from seawater

Synchrotron radiation studies of the orientation of thin silicon phthalocyanine dichloride film on HOPG substrate

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Chinese Physics C 2008年第9期32卷 769-772页

作者：邓居智陈荣 SEKIGUCHI Tetsuhiro BABA Yuji HIRAO Norie HONDA Mitsunori key Laboratory of Nuclear resources and Environment (East China Institute of Technology) Ministry of Education Synchrotron Radiation Research center Japan Atomic Energy Agency

Thin silicon phthalocyanine dichloride films on HOPG were prepared and the sample was heated in the vacuum with laser. The thickness of the thin sample on HOPG was checked by X-ray photoemission spectroscopy. The orientation of the molecules in respect to the substrate plane was investigated by measuring the silicon K-edge near edge X-ray absorption fine structure （NEXAFS）. In the NEXAFS spectra of the thin sample, two clear peaks which were assigned to Is → σ^＊Si-N and 1s→ σ^＊Si-Cl appeared around 1847.2 eV and 1843.1 eV respectively. The intensities of the resonance peaks showed strong polarization dependence. A quantitative analysis of the polarization dependence revealed that the Si-N bond tended to lie down while the Si-Cl bond was out of the molecular plane.

关键词： near edge X-ray absorption fine structure (NEXAFS) orientation silicon phthalocyanine dichloride polarization dependence

QTL Mapping for Stalk Related Traits in Maize (Zea mays L.) Under Different Densities

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Journal of Integrative Agriculture 2013年第2期12卷 218-228页

作者： ZHU Li-ying CHEN Jing-tang Li Ding ZHANG Jian-hua HUANG Ya-qun ZHAO Yong-feng SONG Zhan-quan LIU Zhi-zeng College of Agronomy Agricultural University of Hebei/Hebei Sub-Center of National Maize Improvement Center Ministry of Agriculture/Northern China Key Laboratory for Crop Germplasm Resources Ministry of Education Baoding University

Stalk related traits, comprising plant height （PH）, ear height （EH）, internode number （IN）, average internode length （ALL）, stalk diameter （SD）, and ear height coefficient （EHC）, are significantly correlated with yield, density tolerance, and lodging resistance in maize. To investigate the genetic basis for stalk related traits, a doubled haploid （DH） population derived from a cross between NX531 and NX110 were evauluated under two densities over 2 yr. The additive quantitative trait loci （QTLs）, epistatic QTLs were detected using inclusive composite interval mapping and QTL-by-environment interaction were detected using mixed linear model. Differences between the two densities were significant for the six traits in the DH population. A linkage map that covered 1 721.19 cM with an average interval of 10.50 cM was constructed with 164 simple sequence repeat （SSR）. Two, two, seven, six, two, and eight additive QTLs for PH, IN, AIL, EH, SD, and EHC, respectively. The extend of their contribution to penotypic variation ranged from 10.10 to 31.93%. Seven QTLs were indentified simultaneously under both densities. One pair, two pairs and one pair of epistatic effects were detected for AIL, SD and EHC, respectively. No epistatic effects were detected for PH, EH, and IN. Nineteen QTLs with environment interactions were detected and their contribution to phenotypic variation ranged from 0.43 to 1.89%. Some QTLs were stably detected under different environments or genetic backgrounds comparing with previous studies. These QTLs could be useful for genetic improvement of stalk related traits in maize breeding.

关键词： maize density stalk related traits quantitative trait loci epistatic effect QTL-by-environment interaction

Tomography of the dynamic stress coefficient for stress wave prediction in sedimentary rock layer under the mining additional stress

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International Journal of Mining Science and Technology 2021年第4期31卷 653-663页

作者： Wenlong Shen Guocang Shi Yungang Wang Jianbiao Bai Ruifeng Zhang Xiangyu Wang Henan key Laboratory for Green and Efficient Mining&Comprehensive utilization of Mineral resources School of Energy Science and EngineeringHenan Polytechnic UniversityJiaozuo 454000China key Laboratory of Deep Coal Resource Mining ministry of education State Key Laboratory of Coal Resources and Safe MiningChina University of Mining and TechnologyXuzhou 221116China Collaborative Innovation center of Coal Work Safety and Clean High Efficiency utilization Jiaozuo 454000China

In this study,the tomography of dynamic stress coefficient(TDSC)was established based on a mechanical model of stress wave propagation in bedding planes and a mathematical model of the stress wave attenuation in rock *** reliability of the TDSC was verified by a linear bedding plane model and field ***,the TDSC in the dynamic stress propagation of bedding planes increases with the following conditions:(1)the increase of the normal stiffness of the bedding plane,(2)the increase of the incident angle of the stress wave,(3)the decrease of the incident frequency of the stress wave,or(4)the growth of three ratios(the ratios of rock densities,elastic moduli,and the Poisson’s ratios)of rocks on either side of bedding *** additional stress weakens TDSC linearly and slowly during the stress wave propagation in bedding planes,and the weakening effect increases with the growth of the three ***,the TDSC decreases exponentially in the rock mass as propagation distance *** a field case,the TDSC decreases significantly as vertical and horizontal distances increase and its wave range increases as vertical distance increases in the sedimentary rock layers.

关键词： Tomography of the dynamic stress coefficient Stress wave attenuation Mining additional stress Sedimentary rock layer

Responses of Aerobic Rice (Oryza sativa L.) to Iron Deficiency

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Journal of Integrative Agriculture 2012年第6期11卷 938-945页

作者： SHI Rong-li HAO Hong-mei FAN Xiao-yun Md Rezaul Karim ZHANG Fu-SUO ZOU Chun-qin key Laboratory of Plant-Soil Interaction Ministry of Education/Center for ResourcesEnvironment and Food SecurityDepartment of Plant NutritionChina Agricultural University

Aerobic rice has the advantage of saving water. Most published work has focused on improving its yield, while few reported on its micronutrient status. In fact, Fe deficiency is a common nutritional problem in the production of aerobic rice. Short- term hydroponic culture experiments were conducted to study the response of aerobic rice to Fe deficiency and the effect of root exudates from Fe-deficient wheat on its Fe uptake ability. The results indicate that the amount of phytosiderophores （PS） released from aerobic rice did not increase under Fe deficient conditions. The Fe（III） reducing capacity of Fe-deficient aerobic rice did not increase and the solution pH did not decrease significantly. What＇s more, no obvious swelling was observed in the root tips. Aerobic rice did not show special responses to improve their Fe nutrition under Fe deficiency as both strategy I and II plants though they were very sensitive to Fe deficiency. This may be a reason which causes Fe deficiency problem in aerobic rice. However, root exudates from Fe-deficient wheat （PSw） could improve its Fe nutrition in the presence of insoluble Fe（OH）3. This suggests that aerobic rice could utilize Fe activated by PSw.

关键词： aerobic rice Fe(III)-reduction iron nutrition phytosiderophore release root tip swelling

Comparison of Results of Recent Seismic Profiles with Tectonic Models of the North China Craton

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Journal of Earth Science 2011年第2期22卷 250-259页

作者： Timothy M Kusky State key Laboratory of Geological Processes and Mineral resources Three Gorges Research Center for Geo-hazardMinistry of EducationChina University of Geosciences

The geometry and timing of amalgamation of the North China craton（NCC） have been controversial,with three main models with significantly different interpretations of regional structure,geochronology,and geological *** model of Zhao G C et *** that the eastern and western blocks of the NCC formed separately in the Archean,and an active margin was developed on the eastern block between 2.5 and 1.85 Ga,when the two blocks collided above an east dipping subduc-tion *** model of Kusky et *** that the eastern block rifted from an unknown larger continent at circa 2.7 Ga,and experienced a collision with an arc（perhaps attached to the western block） above a west-dipping subduction zone at 2.5 Ga,and the 1.85 Ga metamorphism is related to a collision along the northern margin of the craton when the NCC joined the Columbia *** model of Faure et *** two collisions in the central orogenic belt,at 2.1 and 1.88 *** seismic results support both the models of Kusky et *** Faure et al.,showing that subduction be-neath the central orogenic belt（COB） was west-directed,and that there is a second,west-dipping pa-leosubduction zone located to the east of the COB dipping beneath the western block（Ordos craton）.The boundaries identified through geophysics do not correlate with the boundaries of the Trans-North China orogen suggested in the Zhao et ***,and the subduction polarity is opposite that predicted by that *** seismic profiles are consistent with an Archean collision above a west-dipping sub-duction zone beneath the COB predicted by the models of Kusky et al.,and the second west-dipping subduction zone is consistent with the two events suggested in the Faure et ***.

关键词： North China craton Archean tectonics geophysics.

Atomic-level unveiling secondary recrystallization enabled microand macroscopic polarization enhancement for piezophotocatalytic oxygen activation

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Nano Research 2024年第6期17卷 5040-5049页

作者： Kai Lin Zijian Zhu Weiyi Ge Tianxing Jiang Hongwei Huang Engineering Research center of ministry of education for Geological Carbon Storage and Low Carbon utilization of resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid WastesNational Laboratory of Mineral MaterialsSchool of Material Sciences and TechnologyChina University of Geosciences(Beijing)Beijing 100083China School of Chemistry Beihang UniversityBeijing 100191China

Piezoelectric semiconductors bear the bifunctional photocatalysis and piezocatalysis,while the absent or weak internal charge driving force severely restricts its catalytic *** polarization strategy is desirable,and particularly understanding its mechanism from a microscopic perspective remains ***,we report a secondary recrystallization approach to achieving the simultaneous micro-and macroscopic polarization enhancement on Bi2WO6 nanosheets for boosting piezo-photocatalytic oxygen activation,and unravel the mechanism at an *** secondary recrystallization process not only results in a strengthened distortion of[WO6]octahedra with distortion index enhancement by~20%for a single octahedron,but also enables lateral crystal growth of nanosheets along the ab plane(av.50 to 180 nm),which separately allows the rise in dipole moment of unit cell(e.g.,1.63 D increase along a axis)and the stacking of the distorted[WO6]octahedron to accumulate the unit cell dipole,collectively contributing to the considerably strengthened spontaneous polarization and ***,exposure of large-area{001}front facet enables more efficient capture and conversion of stress into ***,the well-recrystallized Bi2WO6 nanosheets exhibit considerably promoted piezo-photocatalytic reactive oxygen species generation,given the decreased specific surface *** work presents a feasible methodology to regulate inside-out polarization for guiding carriers transfer behavior,and may advance the solid understanding on the intrinsic mechanism.

关键词： secondary recrystallization piezo-photocatalytic oxygen activation octahedron distortion polar units stacking micro-and macroscopic polarization enhancement

Novel QTLs from Wild Rice Oryza longistaminata Confer Strong Tolerance to High Temperature at Seedling Stage

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Rice science 2023年第6期30卷 577-586页

作者： FAN Fengfeng CAI Meng LUO Xiong LIU Manman YUAN Huanran CHENG Mingxing Ayaz AHMAD LI Nengwu LI Shaoqing State key Laboratory of Hybrid Rice Key Laboratory for Research and Utilization of Heterosis in Indica Rice of Ministry of Agriculture and Rural AffairsEngineering Research Center for Plant Biotechnology and Germplasm Utilization of Ministry of EducationCollege of Life ScienceWuhan UniversityWuhan 430072China Hubei Hongshan Laboratory Wuhan 430072China

Global warming poses a threat to rice *** heat-tolerant rice is an effective and economical approach to address this *** rice is a valuable genetic resource for developing heat-tolerant crops due to its intricate mechanism for adapting to high *** longistaminata,a widely distributed wild rice species in Africa,may harbor an even richer gene pool for heat tolerance,which remains *** this study,we identified three heat tolerance QTLs from *** at the seedling stage,including novel heat tolerance loci qTT4 and *** findings demonstrated that the *** alleles for these two QTLs can enhance the heat tolerance of rice ***,qTT5 was mapped to a region spanning approximately 287.2 kb,which contains 46 expressing *** the analysis of Gene Ontology and expression differences under heat induction,we identified four candidate *** results lay the foundation for discovering heat tolerance genes underlying *** and developing new genetic resources for heat-tolerant rice breeding.

关键词： wild rice Oryza longistaminata heat tolerance QTL